Siemens SIROTEC - Page 27

Equipotential Bonding
© Siemens AG, 2004. All rights reserved
EMC Installation Guideline – Planning Guide (EMV) – 03.2004 Edition
4-27
Fil-
ter
Metal cubicle
840D 611
Hand-held
unit
*)
QWERTY
keyboard
Operator
panel
Mach. cont. p.
El. handwheel
Operator panel
Fil-
ter
**)
Central
earthing connector
DIN rail
SIMATIC S7-300
Machine base
M
Large-area, conductive connection to earthed housing
1) PE in motor cable, also used as equipotential
bonding conductor
2) Grounding lead in cable
3) Lead required if unit has a
frame connection
4) Version-dependent connection
1)
M
CPU
314
2)
NCK
I/Os
Central
earthing bar
*) With I/RF module
**) With U/E module
Distr.
box
3)
Floppy
drive
Motor controlled by 611D
4)
4)
XXX
XXX
XXX
XXX
XXX
XXX XXX
XXX
XXX
XXX
Enc.
TG
Fig. 4-6 Equipotential bonding in the SINUMERIK 840D with SIMODRIVE 611